LP to natural gas conversion

We got a used range (Jenn-Air JGR8750, unknown age) that was used on LP gas. We need to turn it to natural. There were no extra orifices hidden anywhere on the unit. One place I called said the parts were $70; another said that since the orifice assemblies were not listed as LP vs. natural that they must be adjustable.

Does anyone know the truth of the matter? Thanks! (yes, my husband is going to do this himself no matter what)

We have the same problem. Our stove is hooked up but our burners are really low.We have the same problem. Our stove is hooked up but our burners are really low.

AnonymousFeb 04, 2008

I'm having the exact problem, trying to convert from LP to natural gas. Where can I find the orifaces for natural gas? One parts store told me I had to order the entire tube assembly for each of the 4 burners (approx. cost. $200) Can't I just replace the orifces?I'm having the exact problem, trying to convert from LP to natural gas. Where can I find the orifaces for natural gas? One parts store told me I had to order the entire tube assembly for each of the 4 burners (approx. cost. $200) Can't I just replace the orifces?

AnonymousDec 12, 2008

According to the installation manual, "screw the burner orifice hoods away from the pins. Approximately 1 1/2 to 2 turns" This will correctly configure them for a LP to natural gas conversion.According to the installation manual, "screw the burner orifice hoods away from the pins. Approximately 1 1/2 to 2 turns" This will correctly configure them for a LP to natural gas conversion.

AnonymousDec 21, 2008

i got stove used and want to fix it please help me somebody a jenn- air-expression four eyes.change to natural gasi got stove used and want to fix it please help me somebody a jenn- air-expression four eyes.change to natural gas

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48,245 Answers

Re: LP to natural gas conversion

First up
gas is not in a diy domain and it is more dangerous to work on gas than electricity
next the change over from to natural gas is a matter of the correct size gas jets for natural gas and adjustment of the air shrouds to get the correct air /gas ratio
get in a gas fitter to do the job and be safe

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Where do all orifices go on anything gas? Right there where the burner meets gas valve. The air shutter sits right in front of the orifice for proper air to gas ratio right.Go out and look at yer gas grill. Where the burners meet the gas valve ye shall find the orifice.

I am having almost the same problem. Frigidaire told me to replace all 5 mixing tubes, ~$385, yeah right. They don't have the orifices itemized as an individual part, so no-one carries them, just the LP conversion kit. Another repair/parts guy advised me to drill out the orifices. Some other threads/blogs give the diameter to drill. Basically, since natural gas is 0.5 psi, you need a larger hole than your current propane orifices provide. Please speak up if you find out anything, I will try to do the same. Good luck.

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Jenn Air use to make a kit that had the proper orifices for the burners and the valves. The regulator is adjustable for the conversion by simply reversing the main screw. It was intended to be convertible. However, since the model is discontinued, you can no longer purchase the kit (or the backsplash). Apparently Jenn Air believe that when they stop making a product, no one will ever need a part for it again (cough, cough). Good luck trying to track down a kit. I've tried everywhere in the country and a few shops in Canada. I have a gas appliance expert who thinks he can accomplish the conversion by getting a few of the parts from the LP model and then modifying the rest. The orifices are basically the same, only the LP diameters are different. Theoretically, the ports could be filled and redrilled, but the hardware store was fresh out of 1.07mm bits, so I'll pass on trying this on my own. If anyone has a LP model they want to convert to natural gas, I'll gladly swap parts.

2. Provide an adequate gas supply.
This unit is pre-set to operate on 4" natural gas manifold
pressure. Aconvertible pressure regulator is connected to the
manifold and MUST be connected inseries with the gas supply
line. If the LP/Propane conversion kit has been used, follow
instructions provided with the kit for converting the pressure
regulator to LP/Propane use. The LP kit can be found on the
back side of the range (some models).

You have to get the right orifice's for Natural gas. LP gas orifice has twice the size hole as compared to Natural Gas. Using it without the right orifice will put out way too much gas, and you will burn everything, as well as it will be a fire hazard.

Your local gas company or propane company should be able to get you the right orifice

This is the solution to convert from LP back to natural gas that I posted as a comment on this thread:After much work and little help from Jenn-Air or Whirlpool, I found a satisfactory solution. As many of you may have found out, Whirlpool does not sell the natural gas orifices to the JDR8895AAS separately as they do the LP conversion orifices. Instead, they recommend that you buy all 5 orifice holders that include the individual orifices. This would run about $120-150 depending on where you shop. If you want to take this route, the Whirlpool parts you need are:1x740079621x740078132x740079611x74007816Fortunately, because natural gas is denser than LP, the LP orifices can be bored out for a conversion back to natural gas. After a lot of homework I was able to find someone with the natural gas orifices for this stove that let me take them out to measure them. For some crazy reason, Whirlpool does not have this information:Find a machine shop or a good appliance repair shop that has a wire gauging bit set. The natural gas orifice hole sizes are as follows:Left front burner (16K BTU): 48Left rear burner (9.2K BTU): 54Center burner (5K BTU): 58Right front burner (12.5K BTU): 52Right rear burnger (5K BTU): 58It cost me $25 to have these resized after I found the correct hole size.Finally, to complete the conversion back to natural gas, you must flip the plastic screw-shaped piece by unscrewing the hex nut on the regulator at the back of the stove.Hope this helps, because it took me a while to figure it out.